Document (#19817)

Author
Walker, S.
DeVere, R.
Title
Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion
Imprint
London : British Library
Year
1990
Series
British Library research paper; 72
Content
1. Introduction // 2. Query modification through relevance feedback // 3. System design & description 4. Evaluation // 5. Analysis & results // 6. Conclusions and recommendations
Theme
OPAC
Semantisches Umfeld in Indexierung u. Retrieval

Similar documents (author)

  1. Walker, S.: Okapi : Evaluating and enhancing an experimental online catalog (1987) 4.79 
    4.7947097 = sum of:
  4.7947097 = weight(author_txt:walker in 373) [ClassicSimilarity], result of:
    4.7947097 = fieldWeight in 373, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      7.6715355 = idf(docFreq=55, maxDocs=44218)
      0.625 = fieldNorm(doc=373)
  2. Walker, S.: Ease of use in online catalogues : a plea for the user (1986) 4.79 
    4.7947097 = sum of:
  4.7947097 = weight(author_txt:walker in 375) [ClassicSimilarity], result of:
    4.7947097 = fieldWeight in 375, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      7.6715355 = idf(docFreq=55, maxDocs=44218)
      0.625 = fieldNorm(doc=375)
  3. Walker, S.: ¬The free language approach to online catalogues (1985) 4.79 
    4.7947097 = sum of:
  4.7947097 = weight(author_txt:walker in 383) [ClassicSimilarity], result of:
    4.7947097 = fieldWeight in 383, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      7.6715355 = idf(docFreq=55, maxDocs=44218)
      0.625 = fieldNorm(doc=383)
  4. Walker, S.: ¬Der Mensch-Maschine-Dialog bei Online-Benutzer-Katalogen (1987) 4.79 
    4.7947097 = sum of:
  4.7947097 = weight(author_txt:walker in 827) [ClassicSimilarity], result of:
    4.7947097 = fieldWeight in 827, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      7.6715355 = idf(docFreq=55, maxDocs=44218)
      0.625 = fieldNorm(doc=827)
  5. Walker, R.: Categorization 4.79 
    4.7947097 = sum of:
  4.7947097 = weight(author_txt:walker in 1019) [ClassicSimilarity], result of:
    4.7947097 = fieldWeight in 1019, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      7.6715355 = idf(docFreq=55, maxDocs=44218)
      0.625 = fieldNorm(doc=1019)

Similar documents (content)

  1. Fieldhouse, M.; Hancock-Beaulieu, M.: ¬The changing face of OKAPI (1994) 1.08 
    1.076097 = sum of:
  1.076097 = product of:
    1.2106091 = sum of:
      0.058091123 = weight(abstract_txt:retrieval in 1493) [ClassicSimilarity], result of:
        0.058091123 = score(doc=1493,freq=2.0), product of:
          0.15129778 = queryWeight, product of:
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.043537185 = queryNorm
          0.38395226 = fieldWeight in 1493, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
      0.04822915 = weight(abstract_txt:online in 1493) [ClassicSimilarity], result of:
        0.04822915 = score(doc=1493,freq=1.0), product of:
          0.1683872 = queryWeight, product of:
            1.0549655 = boost
            3.6661522 = idf(docFreq=3073, maxDocs=44218)
            0.043537185 = queryNorm
          0.28641814 = fieldWeight in 1493, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.6661522 = idf(docFreq=3073, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
      0.058373354 = weight(abstract_txt:subject in 1493) [ClassicSimilarity], result of:
        0.058373354 = score(doc=1493,freq=1.0), product of:
          0.19124018 = queryWeight, product of:
            1.1242769 = boost
            3.9070187 = idf(docFreq=2415, maxDocs=44218)
            0.043537185 = queryNorm
          0.30523583 = fieldWeight in 1493, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.9070187 = idf(docFreq=2415, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
      0.18211752 = weight(abstract_txt:query in 1493) [ClassicSimilarity], result of:
        0.18211752 = score(doc=1493,freq=3.0), product of:
          0.28311536 = queryWeight, product of:
            1.367935 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.043537185 = queryNorm
          0.6432626 = fieldWeight in 1493, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
      0.11741057 = weight(abstract_txt:relevance in 1493) [ClassicSimilarity], result of:
        0.11741057 = score(doc=1493,freq=1.0), product of:
          0.30472457 = queryWeight, product of:
            1.4191799 = boost
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.043537185 = queryNorm
          0.38530064 = fieldWeight in 1493, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
      0.1548945 = weight(abstract_txt:catalogues in 1493) [ClassicSimilarity], result of:
        0.1548945 = score(doc=1493,freq=1.0), product of:
          0.36654449 = queryWeight, product of:
            1.5564926 = boost
            5.4090285 = idf(docFreq=537, maxDocs=44218)
            0.043537185 = queryNorm
          0.42258036 = fieldWeight in 1493, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.4090285 = idf(docFreq=537, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
      0.20558125 = weight(abstract_txt:feedback in 1493) [ClassicSimilarity], result of:
        0.20558125 = score(doc=1493,freq=1.0), product of:
          0.44268182 = queryWeight, product of:
            1.7105255 = boost
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.043537185 = queryNorm
          0.46439958 = fieldWeight in 1493, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
      0.3859116 = weight(abstract_txt:expansion in 1493) [ClassicSimilarity], result of:
        0.3859116 = score(doc=1493,freq=3.0), product of:
          0.46707594 = queryWeight, product of:
            1.7570231 = boost
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.043537185 = queryNorm
          0.82622886 = fieldWeight in 1493, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.078125 = fieldNorm(doc=1493)
    0.8888889 = coord(8/9)
  2. Lam-Adesina, A.M.; Jones, G.J.F.: Examining and improving the effectiveness of relevance feedback for retrieval of scanned text documents (2006) 0.91 
    0.90846765 = sum of:
  0.90846765 = product of:
    1.1680298 = sum of:
      0.08049343 = weight(abstract_txt:retrieval in 977) [ClassicSimilarity], result of:
        0.08049343 = score(doc=977,freq=6.0), product of:
          0.15129778 = queryWeight, product of:
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.043537185 = queryNorm
          0.5320199 = fieldWeight in 977, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.0625 = fieldNorm(doc=977)
      0.03858332 = weight(abstract_txt:online in 977) [ClassicSimilarity], result of:
        0.03858332 = score(doc=977,freq=1.0), product of:
          0.1683872 = queryWeight, product of:
            1.0549655 = boost
            3.6661522 = idf(docFreq=3073, maxDocs=44218)
            0.043537185 = queryNorm
          0.22913451 = fieldWeight in 977, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.6661522 = idf(docFreq=3073, maxDocs=44218)
            0.0625 = fieldNorm(doc=977)
      0.118958674 = weight(abstract_txt:query in 977) [ClassicSimilarity], result of:
        0.118958674 = score(doc=977,freq=2.0), product of:
          0.28311536 = queryWeight, product of:
            1.367935 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.043537185 = queryNorm
          0.4201774 = fieldWeight in 977, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.0625 = fieldNorm(doc=977)
      0.18785691 = weight(abstract_txt:relevance in 977) [ClassicSimilarity], result of:
        0.18785691 = score(doc=977,freq=4.0), product of:
          0.30472457 = queryWeight, product of:
            1.4191799 = boost
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.043537185 = queryNorm
          0.616481 = fieldWeight in 977, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.0625 = fieldNorm(doc=977)
      0.16113107 = weight(abstract_txt:improving in 977) [ClassicSimilarity], result of:
        0.16113107 = score(doc=977,freq=1.0), product of:
          0.43667892 = queryWeight, product of:
            1.6988883 = boost
            5.9038734 = idf(docFreq=327, maxDocs=44218)
            0.043537185 = queryNorm
          0.3689921 = fieldWeight in 977, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9038734 = idf(docFreq=327, maxDocs=44218)
            0.0625 = fieldNorm(doc=977)
      0.32893 = weight(abstract_txt:feedback in 977) [ClassicSimilarity], result of:
        0.32893 = score(doc=977,freq=4.0), product of:
          0.44268182 = queryWeight, product of:
            1.7105255 = boost
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.043537185 = queryNorm
          0.7430393 = fieldWeight in 977, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.0625 = fieldNorm(doc=977)
      0.25207642 = weight(abstract_txt:expansion in 977) [ClassicSimilarity], result of:
        0.25207642 = score(doc=977,freq=2.0), product of:
          0.46707594 = queryWeight, product of:
            1.7570231 = boost
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.043537185 = queryNorm
          0.53969043 = fieldWeight in 977, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.0625 = fieldNorm(doc=977)
    0.7777778 = coord(7/9)
  3. He, D.; Wu, D.: Enhancing query translation with relevance feedback in translingual information retrieval : a study of the medication process (2011) 0.87 
    0.866774 = sum of:
  0.866774 = product of:
    1.300161 = sum of:
      0.0464729 = weight(abstract_txt:retrieval in 4244) [ClassicSimilarity], result of:
        0.0464729 = score(doc=4244,freq=2.0), product of:
          0.15129778 = queryWeight, product of:
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.043537185 = queryNorm
          0.3071618 = fieldWeight in 4244, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.0625 = fieldNorm(doc=4244)
      0.20604248 = weight(abstract_txt:query in 4244) [ClassicSimilarity], result of:
        0.20604248 = score(doc=4244,freq=6.0), product of:
          0.28311536 = queryWeight, product of:
            1.367935 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.043537185 = queryNorm
          0.72776866 = fieldWeight in 4244, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.0625 = fieldNorm(doc=4244)
      0.2100304 = weight(abstract_txt:relevance in 4244) [ClassicSimilarity], result of:
        0.2100304 = score(doc=4244,freq=5.0), product of:
          0.30472457 = queryWeight, product of:
            1.4191799 = boost
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.043537185 = queryNorm
          0.6892467 = fieldWeight in 4244, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.0625 = fieldNorm(doc=4244)
      0.16113107 = weight(abstract_txt:improving in 4244) [ClassicSimilarity], result of:
        0.16113107 = score(doc=4244,freq=1.0), product of:
          0.43667892 = queryWeight, product of:
            1.6988883 = boost
            5.9038734 = idf(docFreq=327, maxDocs=44218)
            0.043537185 = queryNorm
          0.3689921 = fieldWeight in 4244, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9038734 = idf(docFreq=327, maxDocs=44218)
            0.0625 = fieldNorm(doc=4244)
      0.3677549 = weight(abstract_txt:feedback in 4244) [ClassicSimilarity], result of:
        0.3677549 = score(doc=4244,freq=5.0), product of:
          0.44268182 = queryWeight, product of:
            1.7105255 = boost
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.043537185 = queryNorm
          0.8307432 = fieldWeight in 4244, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.0625 = fieldNorm(doc=4244)
      0.3087293 = weight(abstract_txt:expansion in 4244) [ClassicSimilarity], result of:
        0.3087293 = score(doc=4244,freq=3.0), product of:
          0.46707594 = queryWeight, product of:
            1.7570231 = boost
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.043537185 = queryNorm
          0.6609831 = fieldWeight in 4244, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.0625 = fieldNorm(doc=4244)
    0.6666667 = coord(6/9)
  4. Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬An evaluation of interactive query expansion in an online library catalogue with a graphical user interface (1995) 0.80 
    0.797873 = sum of:
  0.797873 = product of:
    1.1968095 = sum of:
      0.069709346 = weight(abstract_txt:retrieval in 1666) [ClassicSimilarity], result of:
        0.069709346 = score(doc=1666,freq=2.0), product of:
          0.15129778 = queryWeight, product of:
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.043537185 = queryNorm
          0.4607427 = fieldWeight in 1666, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.09375 = fieldNorm(doc=1666)
      0.05787498 = weight(abstract_txt:online in 1666) [ClassicSimilarity], result of:
        0.05787498 = score(doc=1666,freq=1.0), product of:
          0.1683872 = queryWeight, product of:
            1.0549655 = boost
            3.6661522 = idf(docFreq=3073, maxDocs=44218)
            0.043537185 = queryNorm
          0.34370178 = fieldWeight in 1666, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.6661522 = idf(docFreq=3073, maxDocs=44218)
            0.09375 = fieldNorm(doc=1666)
      0.21854104 = weight(abstract_txt:query in 1666) [ClassicSimilarity], result of:
        0.21854104 = score(doc=1666,freq=3.0), product of:
          0.28311536 = queryWeight, product of:
            1.367935 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.043537185 = queryNorm
          0.7719152 = fieldWeight in 1666, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.09375 = fieldNorm(doc=1666)
      0.14089268 = weight(abstract_txt:relevance in 1666) [ClassicSimilarity], result of:
        0.14089268 = score(doc=1666,freq=1.0), product of:
          0.30472457 = queryWeight, product of:
            1.4191799 = boost
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.043537185 = queryNorm
          0.46236074 = fieldWeight in 1666, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.09375 = fieldNorm(doc=1666)
      0.24669749 = weight(abstract_txt:feedback in 1666) [ClassicSimilarity], result of:
        0.24669749 = score(doc=1666,freq=1.0), product of:
          0.44268182 = queryWeight, product of:
            1.7105255 = boost
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.043537185 = queryNorm
          0.55727947 = fieldWeight in 1666, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.09375 = fieldNorm(doc=1666)
      0.46309394 = weight(abstract_txt:expansion in 1666) [ClassicSimilarity], result of:
        0.46309394 = score(doc=1666,freq=3.0), product of:
          0.46707594 = queryWeight, product of:
            1.7570231 = boost
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.043537185 = queryNorm
          0.9914746 = fieldWeight in 1666, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.09375 = fieldNorm(doc=1666)
    0.6666667 = coord(6/9)
  5. Fernández-Reyes, F.C.; Hermosillo-Valadez, J.; Montes-y-Gómez, M.: ¬A prospect-guided global query expansion strategy using word embeddings (2018) 0.70 
    0.6978621 = sum of:
  0.6978621 = product of:
    1.0467931 = sum of:
      0.032861304 = weight(abstract_txt:retrieval in 5090) [ClassicSimilarity], result of:
        0.032861304 = score(doc=5090,freq=1.0), product of:
          0.15129778 = queryWeight, product of:
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.043537185 = queryNorm
          0.21719621 = fieldWeight in 5090, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.4751394 = idf(docFreq=3720, maxDocs=44218)
            0.0625 = fieldNorm(doc=5090)
      0.23791735 = weight(abstract_txt:query in 5090) [ClassicSimilarity], result of:
        0.23791735 = score(doc=5090,freq=8.0), product of:
          0.28311536 = queryWeight, product of:
            1.367935 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.043537185 = queryNorm
          0.8403548 = fieldWeight in 5090, product of:
            2.828427 = tf(freq=8.0), with freq of:
              8.0 = termFreq=8.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.0625 = fieldNorm(doc=5090)
      0.09392846 = weight(abstract_txt:relevance in 5090) [ClassicSimilarity], result of:
        0.09392846 = score(doc=5090,freq=1.0), product of:
          0.30472457 = queryWeight, product of:
            1.4191799 = boost
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.043537185 = queryNorm
          0.3082405 = fieldWeight in 5090, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.0625 = fieldNorm(doc=5090)
      0.16113107 = weight(abstract_txt:improving in 5090) [ClassicSimilarity], result of:
        0.16113107 = score(doc=5090,freq=1.0), product of:
          0.43667892 = queryWeight, product of:
            1.6988883 = boost
            5.9038734 = idf(docFreq=327, maxDocs=44218)
            0.043537185 = queryNorm
          0.3689921 = fieldWeight in 5090, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9038734 = idf(docFreq=327, maxDocs=44218)
            0.0625 = fieldNorm(doc=5090)
      0.164465 = weight(abstract_txt:feedback in 5090) [ClassicSimilarity], result of:
        0.164465 = score(doc=5090,freq=1.0), product of:
          0.44268182 = queryWeight, product of:
            1.7105255 = boost
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.043537185 = queryNorm
          0.37151965 = fieldWeight in 5090, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9443145 = idf(docFreq=314, maxDocs=44218)
            0.0625 = fieldNorm(doc=5090)
      0.3564899 = weight(abstract_txt:expansion in 5090) [ClassicSimilarity], result of:
        0.3564899 = score(doc=5090,freq=4.0), product of:
          0.46707594 = queryWeight, product of:
            1.7570231 = boost
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.043537185 = queryNorm
          0.76323754 = fieldWeight in 5090, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            6.1059003 = idf(docFreq=267, maxDocs=44218)
            0.0625 = fieldNorm(doc=5090)
    0.6666667 = coord(6/9)